feat (PHP LARAVEL) 8417: initial PHP-laravel codegen integration (#574)

* feat (PHP LARAVEL) 8417: initial PHP-laravel codegen integration

* feat (PHP LARAVEL) 8417: code review adjustments

* feat (PHP LARAVEL) 8417: fix typos; add missing files; adjust readme for those unfamilar with laravel to get started quickly

* feat (PHP LARAVEL) 8417: add sample petstore server

* feat (PHP LARAVEL) 8417: adjust route service provdider and model generation

samples/server/petstore/php-laravel/lib/tests/CreatesApplication.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Tests;
+
+use Illuminate\Contracts\Console\Kernel;
+
+trait CreatesApplication
+{
+    /**
+     * Creates the application.
+     *
+     * @return \Illuminate\Foundation\Application
+     */
+    public function createApplication()
+    {
+        $app = require __DIR__.'/../bootstrap/app.php';
+
+        $app->make(Kernel::class)->bootstrap();
+
+        return $app;
+    }
+}

samples/server/petstore/php-laravel/lib/tests/Feature/ExampleTest.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Tests\Feature;
+
+use Tests\TestCase;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+class ExampleTest extends TestCase
+{
+    /**
+     * A basic test example.
+     *
+     * @return void
+     */
+    public function testBasicTest()
+    {
+        $response = $this->get('/');
+
+        $response->assertStatus(200);
+    }
+}

samples/server/petstore/php-laravel/lib/tests/TestCase.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace Tests;
+
+use Illuminate\Foundation\Testing\TestCase as BaseTestCase;
+
+abstract class TestCase extends BaseTestCase
+{
+    use CreatesApplication;
+}

samples/server/petstore/php-laravel/lib/tests/Unit/ExampleTest.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Tests\Unit;
+
+use Tests\TestCase;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+class ExampleTest extends TestCase
+{
+    /**
+     * A basic test example.
+     *
+     * @return void
+     */
+    public function testBasicTest()
+    {
+        $this->assertTrue(true);
+    }
+}